On 22 May your 0437 DR position is LAT 25°18.5'N, LONG 51°18.0'W. You observe an unidentified star bearing 116°T at an observed altitude (Ho) of 11°27.8'. The chronometer reads 07h 40m 40s, and is 03m 24s fast. What star did you observe?

Question

On 22 May your 0437 DR position is LAT 25&deg;18.5'N, LONG 51&deg;18.0'W. You observe an unidentified star bearing 116&deg;T at an observed altitude (Ho) of 11&deg;27.8'. The chronometer reads 07h 40m 40s, and is 03m 24s fast. What star did you observe?

Accepted Answer

Option A: Diphda. Calculate the GHA and LHA for the observed time. By comparing the observed altitude and bearing to the computed values for the DR position, the star is identified as Diphda. This aligns with the Nautical Almanac data for the specified date and time.

On 22 May your 0437 DR position is LAT 25&deg;18.5'N, LONG 51&deg;18.0'W. You observe an unidentified star bearing 116&deg;T at an observed altitude (Ho) of 11&deg;27.8'. The chronometer reads 07h 40m 40s, and is 03m 24s fast. What star did you observe?

On 22 May your 0437 DR position is LAT 25°18.5'N, LONG 51°18.0'W. You observe an unidentified star bearing 116°T at an observed altitude (Ho) of 11°27.8'. The chronometer reads 07h 40m 40s, and is 03m 24s fast. What star did you observe?